environment touches the 21st Century battlefield domains of land, air, maritime, cyberspace and space and includes the electromagnetic spectrum and information environment. As users regularly add role-players to create dense urban terrain (DUT), the unpredictable realism slows operations while increasing the speed and complexity of tactical engagements. In 2022, the Muscatatuck Urban Training Center was renamed to simply "Muscatatuck" to more accurately represent its status as an extension of Camp Atterbury. Indiana Air Range Complex The Indiana Air Range Complex (IARC) enables training and testing activities utilizing special use and managed airspace supporting both kinetic and non-kinetic air-to-ground operations. It consists of Camp Atterbury, Muscatatuck Urban Training Center and Jefferson Range and the supporting associated special-use airspace. The IARC supports unmanned aerial systems (UAS), close-air support training and two Indiana Air National Guard Wings, co-located on civilian airports. See also Bakalar Air Force Base (formerly Atterbury Army Air Base) Notes References External links Camp Atterbury, Indiana Military Organization Description of Camp Atterbury, in a June 1945 letter from Vincent Chalk to Margret Krumpleman Housing at Camp Atterbury, circa 1943, W.H. Bass Photo Company Collection, Indiana Historical Society Official Site for Muscatatuck Urban Training Center Atterbury Military installations established in 1942 Buildings and structures in Bartholomew County, Indiana Buildings and structures in Brown County, Indiana Johnson County, Indiana Atterbury, Camp Military installations in Indiana Indiana in World War II Training installations of the United States Army Geography of Bartholomew County, Indiana Geography of Brown County, Indiana 1942 establishments in Indiana